code: def test_unique_keys_complete_overlap(self):
      hmap1 = HoloMap({i: Curve(range(10)) for i in range(5)})
      hmap2 = HoloMap({i: Curve(range(10)) for i in range(3, 10)})
      dims, keys = unique_dimkeys(hmap1 + hmap2)
      self.assertEqual(hmap1.kdims, dims)
      self.assertEqual(keys, [(i,) for i in range(10)])
  
file_path: holoviews/holoviews/tests/core/test_traversal.py
imports: from holoviews import Curve, DynamicMap, HoloMap
  from holoviews.core.traversal import unique_dimkeys
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 1 for calling the TestUniqueDimKeys obj's underlying member method code with example usage: obj.test_unique_keys_complete_overlap() without return types